union_lookup panics ...

[Marc G. Fournier]

grep union /var/log/messages
Jul  2 12:53:01 jupiter savecore: reboot after panic: union_lookup returning . (0xc68e9e90) not same as startdir (0xc5e062c0)
Jul  2 14:35:07 jupiter savecore: reboot after panic: union_lookup returning . (0xbf6fee90) not same as startdir (0xbb6d58c0)

had two of them today, dumping nice cores ... I'm suspecting its someone
trying to remove a file that is "scrambled" ... I can do similar doing a
pkg_delete ... but, is there any way of finding which file?

The code is here, but I can't seem to even get an inode out of it to using
'find' to find:

(kgdb) list
610
611     #ifdef DIAGNOSTIC
612             if (cnp->cn_namelen == 1 &&
613                 cnp->cn_nameptr[0] == '.' &&
614                 *ap->a_vpp != dvp) {
615                     panic("union_lookup returning . (%p) not same as
startdir (%p)", ap->a_vpp, dvp);
616             }
617     #endif
618
619             return (error);
(kgdb) print *ap->a_vpp
$1 = (struct vnode *) 0x0
(kgdb) print dvp
$2 = (struct vnode *) 0xc5e062c0
(kgdb) print *dvp
$3 = {v_flag = 0, v_usecount = 1, v_writecount = 0, v_holdcnt = 0,
  v_id = 272969383, v_mount = 0x89a7dc00, v_op = 0x89475000, v_freelist =
{
    tqe_next = 0x0, tqe_prev = 0xc187151c}, v_nmntvnodes = {
    tqe_next = 0xc2cdeec0, tqe_prev = 0xbfefe264}, v_cleanblkhd = {
    tqh_first = 0x0, tqh_last = 0xc5e062ec}, v_dirtyblkhd = {tqh_first =
0x0,
    tqh_last = 0xc5e062f4}, v_synclist = {le_next = 0x0, le_prev = 0x0},
  v_numoutput = 0, v_type = VREG, v_un = {vu_mountedhere = 0x0,
    vu_socket = 0x0, vu_spec = {vu_specinfo = 0x0, vu_specnext = {
        sle_next = 0x0}}, vu_fifoinfo = 0x0}, v_lease = 0x0, v_lastw = 0,
  v_cstart = 0, v_lasta = 0, v_clen = 0, v_object = 0x0, v_interlock = {
    lock_data = 0}, v_vnlock = 0x0, v_tag = VT_UNION, v_data = 0x92aa0080,
  v_cache_src = {lh_first = 0x0}, v_cache_dst = {tqh_first = 0x0,
    tqh_last = 0xc5e06340}, v_dd = 0xc5e062c0, v_ddid = 0, v_pollinfo = {
    vpi_lock = {lock_data = 0}, vpi_selinfo = {si_pid = 0, si_note = {
        slh_first = 0x0}, si_flags = 0}, vpi_events = 0, vpi_revents = 0},
  v_vxproc = 0x0}
(